I'm not sure what you're getting at here.... The first note looks normal. The second and third are the "small D4" error. Are you talking about the positioning of the "D4" relative to the serial number and the engraved border? That's rather variable even on normal notes. If you look at the position of the "D4" relative to the black Fed seal, it looks to be the same on both of your error notes. Here's one I found in circulation years ago, for comparison.... Or am I completely missing your point?
Thanks for the clarification Numbers. From the pics Clay posted earlier I thought i saw a difference in all three.